I had raised them w/ feed in the morning and kept them penned in a yard for the first 8 weeks, butchered 20 of them and turned the other thirty out totally free. Everyone in my flock which numbered 62 (layers, ducks, turkeys too) got only about 10 lbs of feed per day had to look for the rest of their diet on their own. The early ones I butchered were around 4# dressed and I just butchered the rest last night and they dressed out at 7.5 - 8.5#. I'd say they can find food! I was impressed and I will probably do it that way again. The ones I just butchered were 4.5 months old. Never lost ONE to leg problems or overeating (heart failure) after they were turned loose. Oh and I had the benefit of spreading the butchering process over the summer. The feed amounts probably add up to what they would have eaten in a shorter period of time to reach the same weight but it helped to budget the feed cost out over a longer period of time. Lots of chicken in our freezer, still tender and lots of meat not just bone. Besides all that they seemed very happy! The poop was also not all in one place, less stink, but also on our front steps, not too cool!